contact the periodicity of these oscillations is rather variable 2 10 min . However, within an islet of Langerhans the oscillations become synchronized by electrical coupling between closely located beta ... hellman Image Insulin oscillations coordination.svg thumb left 150px Coordination of pulsatile insulin ... name hellman Clinical significance The insulin oscillations are particularly pronounced in the portal ... of the insulin oscillations occur early in type 2 diabetes and may contribute to insulin resistance ... more details
is modelled by the Luttinger liquid Tomanaga Luttinger liquid ref D. Vieira et al ., Friedel oscillations ... mechanical scenario of Friedel Oscillations periodic arrangements of oppositely charged fermions followed ... In the figure to the right, a 2 dimensional Friedel Oscillations has been illustrated with an Scanning ... of the Friedel Oscillations as a function of electron energy, an increase in wavelength with decreasing electron energy. ref name 2Degassys Physical Science Laboratory, Friedel Oscillations in 2D ... 2009 06 02 friedel oscillations wherein we learn that the electron has a size a simple explanation of the phenomenon DEFAULTSORT Friedel Oscillations Category Condensed matter physics ... more details
More footnotes date April 2010 Neutrino oscillations are a quantum mechanics quantum mechanical phenomenon ... deal of evidence for neutrino oscillations has been collected from many sources, over a wide range ... experiment to detect the effects of neutrino oscillations was Raymond Davis Jr. Ray Davis s Homestake ... oscillations were not conclusively identified as the source of the deficit until the Sudbury Neutrino ... from the vacuum oscillations described later in this article. Atmospheric neutrino oscillation Large ... a very high precision measurement of neutrino oscillations in an energy range of hundreds of MeV to a few TeV, and with a baseline of the diameter of the Earth . Reactor neutrino oscillations Many experiments have searched for oscillations of electron antimatter anti neutrinos produced at nuclear ... km. Beam neutrino oscillations Neutrino beams produced at a particle accelerator offer the greatest ... neutrino oscillations which take place in atmospheric neutrino oscillation, using neutrinos with a few ... a baseline of 810 km. Decay oscillations GSI anomaly A study of the decay of radioactive ... to neutrino oscillations. ref name Nontech intro http www.symmetrymagazine.org breaking 2008 06 ..., the theoretical description of this effect in terms of neutrino oscillations has been a source ... oscillations. Theory Classical analogue of neutrino oscillation Vertical images list align right width ... Main Pontecorvo Maki Nakagawa Sakata matrix The idea of neutrino oscillations was put forward in 1957 ... neutrino experiments have shown that neutrino oscillations are due to a mismatch between the flavor ... Effects on Neutrino Oscillations class hep ph year 2006 ref math frac Delta m 2 , c 3 , L 4 hbar E ... Electron neutrino oscillations, long range. Here and in the following diagrams black means electron ... short.png thumb none 400px Electron neutrino oscillations, short range Image muon neutrino oscillation long.png thumb none 400px Muon neutrino oscillations, long range Image muon neutrino oscillation ... more details
The term solar like oscillations refers to oscillation s in other star s that are excited in the same way as those in the Sun , namely by convection in its outer layers. See also asteroseismology helioseismology Variable star Solar like oscillations variable stars Procyon Oscillations controversy Procyon Space missions COROT , Kepler Mission Kepler , Microvariability and Oscillations of STars telescope MOST , Wide Field Infrared Explorer WIRE External links http whome.phys.au.dk jcd oscilnotes Lecture Notes on Stellar Oscillations published by J rgen Christensen Dalsgaard J. Christensen Dalsgaard Aarhus University , Denmark Category Variable stars Star Var star stub ... more details
Subthreshold membrane potential oscillations are rhythmic fluctuations of the voltage difference between the interior and exterior of a neuron , in the nervous system . Neurons produce action potentials when their membrane potential increases past a critical threshold. If the voltage is below the threshold the neuron does not fire, but the membrane potential still fluctuates due to postsynaptic potential postsynaptic potentials and intrinsic electrical properties of neurons. In some type of neurons, the membrane potential can oscillation oscillate at specific frequencies. Although subthreshold oscillations do not directly result in neuronal firing, they may facilitate neural synchronization synchronous activity of neighboring neurons. It may also facilitate computation, particularly processing of sensory signals Overview Neurons display, beyond synapse synaptic and action potentials , rhythmic subthreshold membrane potential oscillations a particular type of neural oscillations . These oscillations , which resembled sinusoidal wave forms were originally discovered in the mammalian inferior olive nucleus cells. ref Llinas R. and Yarom Y. 1986 Oscillatory properties of guinea pig inferior ... ref The functional relevance of subthreshold oscillations concerns the nature of the intrinsic electrical ... T.and Heinemann U. 1998 . Subthreshold membrane potential oscillations in neurons of deep layers of the entorhinal ... oscillations and low threshold spikes in rat entorhinal cortex layer V neurons. J. Gen. Physiol ... Frequency of Subthreshold Oscillations Scales with Entorhinal Grid Cell Field Spacing Science ... oscillations and spiking patterns PNAS 104 15911 15916 ref the olfactory bulb ref Desmaison ... oscillations in the olfactory bulb output neurons . J, Neuroscience 19 10727 10737 ref and the dorsal cochlear nucleus . ref Manis, P.B., Molitor, S.C. and Wu, H. 1999 Subthreshold oscillations generated ... 153 443 451 ref The dynamic aspects of such oscillations have been defined using mathematical modeling ... more details
Image BiSON Network.jpg 325px thumb The BiSON stations. The distribution in longitude allows for near continuous observations of the Sun. The Birmingham Solar Oscillations Network BiSON consists of a network of six remote solar observatories monitoring low degree Helioseismology solar oscillation modes. It is operated by the High Resolution Optical Spectroscopy group of the School of Physics and Astronomy at the University of Birmingham , United Kingdom UK , in collaboration with Sheffield Hallam University , United Kingdom UK . They are funded by the Science and Technology Facilities Council Science and Technology Facilities Council STFC . ref name BiSON Home cite web url http bison.ph.bham.ac.uk title BiSON Home accessdate 2009 05 16 ref The BiSON has been collecting data continuously on solar oscillations since 1976, making it the longest running helioseismology network with data covering three Solar cycle solar cycles . ref name BiSON PPT cite web url http astro.phys.au.dk SONG WORKSHOP 2006 Miller.ppt title BiSON The Birmingham Solar Oscillations Network accessdate 2009 05 16 ref Team Academic Staff Professor Yvonne Elsworth Head of project Dr Bill Chaplin Research Staff Dr Anne Marie Broomhall Helioseismology Dr Christoffer Karoff Asteroseismology Dr Saskia Hekker Asteroseismology Mr Brek Miller Mr Steve Hale Technical Staff Mr Ian Barnes Electronics Mr Barry Jackson Mechanic s Remote observatories Image BiSON Sutherland.jpg 325px thumb The BiSON station in Sutherland, South Africa . BiSON operates automated Resonance resonant scattering spectrometer s in astronomical domes or mirror fed systems. The network was established in 1976 with two permanent stations the addition of several more sites culminated with the addition of a sixth in 1992. ref name 1996AAS cite journal date 05 1996 title Recent Results from the Birmingham Solar Oscillations Network BiSON journal American Astronomical Society publisher American Astronomical Society is ... more details
of neutrinos explain the phenomenon of oscillations by endowing these particles with mass. However, if Lorentz violation occurs, oscillations could be due to other mechanisms. The general framework for Lorentz ... propagation, interactions, and oscillations. This neutrino framework first appeared in 1997 ref ... Model Extension SME , including a discussion on Lorentz violating neutrino oscillations , was presented .... General predictions Current experimental results indicate that neutrinos do indeed oscillate. These oscillations ... Beam, Phys. Rev. Lett. 97, 191801 2006 id arxiv hep ex 0212021 ref of atmospheric neutrino oscillations ..., A. Aguilar et al . title Evidence for neutrino oscillations from the observation of math bar nu e ... ref oscillations leading to a mass squared difference that is inconsistent with results from solar ... 1 , mbox eV 2 math . This anomaly Lorentz violating neutrino oscillations Tandem Model can be understood .... The math 3 times3 math off diagonal blocks lead to neutrino antineutrino oscillations ... and can be removed because it does not contribute to oscillations however, it can play an important ... handed neutrinos, leading to Lorentz violating neutrino neutrino oscillations. Similarly, the coefficients ... to Lorentz violating antineutrino antineutrino oscillations. Notice that these coefficients are math ... coefficients, math H alpha beta ab math . These lead to neutrino antineutrino oscillations. All spacetime ... for oscillations. In these cases, the possibility exists of attributing observed oscillations ... violation in math bar nu mu rightarrow bar nu e math oscillations, Phys. Rev. D 72, 076004 2005 id ... M. last3 Mewes title Perturbative Lorentz and CPT violation for neutrino and antineutrino oscillations .... One of the results is that, at leading order, neutrino and antineutrino oscillations are decoupled from one another. This means neutrino antineutrino oscillations are a second order effect. In the two ... Challenging Lorentz noninvariant neutrino oscillations without neutrino masses, Physics Letters B ... more details
Small Satellite Makes Big Discovery Bot generated title ref although this has been Procyon Oscillations ... Orbital launches in 2003 DEFAULTSORT Microvariability And Oscillations Of Stars Telescope Category ... Spaceflight Category 2003 in spaceflight de MOST Satellit es Microvariability and Oscillations ... more details
Cosmology cTopic Baryon Acoustic Oscillations In cosmology , baryon acoustic oscillations BAO refers to an overdensity or clustering of baryonic matter at certain length scales due to Acoustics acoustic waves which propagated in the early universe. ref name ref EisensteinNAR D.J. Eisenstein, New Astronomy Reviews. 49 , 360 2005 . ref In the same way that supernova experiments provide a standard candle for astronomical observations, ref name ref Perlmutter S. Perlmutter, et al. The Astrophysical Journal. 517 , 565 1999 . ref BAO matter clustering provides a standard ruler for length scale in cosmology. ref name ref EisensteinNAR The length of this standard ruler 150 Parsec Mpc in today s universe ref name ref EisensteinAPJ D.J. Eisenstein et. al. The Astrophysical Journal. 633 , 560 2005 . ref can be measured by looking at the large scale structure of matter using astronomical surveys . ref name ref EisensteinAPJ BAO measurements help cosmologists understand more about the nature of dark energy the acceleration of the universe by constraining Lambda CDM model Parameters cosmological parameters . ref name ref EisensteinNAR The Early Universe The early universe consisted of a hot, dense Plasma physics plasma of electrons and baryons protons and neutrons . Photons light particles traveling in this universe were essentially trapped, unable to travel for any considerable distance before ... most column. ref name ref MWhite M. White, Baryon acoustic oscillations and dark energy ... pressure . These counteracting forces of gravity and pressure create oscillations , analogous ... mwhite bao Martin White s Baryon Acoustic Oscillations and Dark Energy Web Page http ... Web Page http arxiv.org abs 0910.5224 Review of Baryon Acoustic Oscillations http www.sdss.org news ... Survey Web Page DEFAULTSORT Baryon Acoustic Oscillations Category Physical cosmology Category Baryons de Baryonische akustische Oszillation fr Oscillations acoustiques des baryons ... more details
The Global Oscillation Network Group GONG is a community based program to study Sun solar Sun Structure internal structure and dynamics using helioseismology . Six solar observatories are involved, with the intention of achieving almost unbroken observation of the Sun. The six observatories are the Teide Observatory Canary Islands , the Learmonth Solar Observatory Western Australia , the Big Bear Solar Observatory California , the Mauna Loa Solar Observatory Hawaii , the Udaipur Solar Observatory India and the Cerro Tololo Inter American Observatory Chile . In 2001, the original GONG detectors were upgraded to 1000 x 1000 pixels and continuous magnetograms were implemented, and the new system is known as GONG . The GONG Program is managed by the National Solar Observatory, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation External links http gong.nso.edu info GONG info at the National Solar Observatory site Category Sun astronomy stub ... more details
QPO may stand for Qualified Petty Officer , a ranking in the Royal Canadian Sea Cadets Quasi periodic oscillations , a phenomenon exhibited by certain astronomical sources disambig fr QPO ... more details
Transient noise pulses consist of a relatively short pulse followed by decaying low frequency oscillations. The initial peak is often due to an Impulse noise audio impulse interference , and the following oscillations are due to resonance on the channel that received the initial pulse. The source of these noise pulses is often channel interference. See also Transient acoustics Category Noise tech stub ... more details
wiktionary starquake Starquake may refer to Starquake astrophysics , an astrophysical phenomenon when the crust of a neutron star undergoes a sudden adjustment Starquake video game , a 1984 computer game Starquake novel , a 1989 novel by Robert L. Forward See also asteroseismology for the study of pressure waves and oscillations within the atmospheres of stars disambig ... more details
BAO may refer to Bachelor of Medicine and Surgery Ireland Baccalaureus in Arte Obstetricia , Bachelor of Obstetrics, a medical degree unique to Ireland. Baryon acoustic oscillations , a signature of the early universe observed in galaxy surveys. Benny Anderssons Orkester Bullets And Octane See also Bao disambiguation disambig eo BAO fr BAO it BAO ... more details
Summary Information Description An illustration of p mode oscillations in a spherical body Source R. Nilsson 2005 , MSc Thesis, Lunds Observatory Date 2005 Author R. Nilsson Permission Reproduced by permission of author CN other versions Licensing cc by 3.0 ... more details
RENO Reactor Experiment for Neutrino Oscillations is a long baseline neutrino oscillation experiment in South Korea . Its goal is to measure or set a limit on sub 13 sub , a neutrino oscillation parameter responsible for changing electron neutrino s into other neutrinos. neutrino detectors physics stub Category Neutrino experiments ... more details
Slow wave may refer to Oscillations of low frequency Slow wave potential Slow wave threshold of smooth muscle Slow wave sleep Slow wave coupler , a set of coupled microstrip lines Other Slow Wave , a comic strip disambig ... more details
The flywheel effect is the continuation of oscillations in an electronic oscillator oscillator Electronic circuit circuit after the control stimulus has been removed. This is usually caused by interacting inductor inductive and capacitor capacitive elements in the oscillator. Circuits undergoing such oscillations are said to be flywheeling . The flywheel effect may be desirable, such as in phase waves phase locked loops used in Synchronization synchronous systems, or undesirable, such as in voltage controlled oscillators. Flywheel effect is used in class C modulation where efficiency of modulation can be achieved as high as 90 . See also Thermal flywheel effect References FS1037C MS188 Category Electronics terms ... more details
planets through the use of earthquake oscillations. ref name DG The oscillations studied by asteroseismologists .... The resulting oscillations are usually studied under the assumption that they are small, and that the star ... a significant influence on the star s oscillations. One application of asteroseismology is neutron ... of neutron star oscillations . Fact date October 2008 Helioseismology , also known as Solar seismology, is the closely related field of study focused on the Sun . Oscillations in the Sun are excited by convection in its outer layers, and observing solar like oscillations in other stars is a new ...., Shibahashi, H., 1989, Nonradial Oscillations of Stars, University of Tokyo Press, Tokyo, Japan, 2nd ... chap 1.pdf Lecture Notes on Stellar Oscillations Chapter 1 . Fifth Edition. June 2003. PDF format ... chap 2.pdf Lecture Notes on Stellar Oscillations Chapter 2 . Fifth Edition. June 2003. PDF format ... and Oscillations of STars telescope MOST A Canadian Space Agency Canadian satellite launched in 2003 ... SONG Stellar Oscillations Network Group SONG http www.helas eu.org European Helio and Asteroseismology ... more details
Summary Graph of a series involving the von Mangoldt function . More precisely, this is a graph of the function math F y sum n 2 infty left Lambda n 1 right e ny math considered by Hardy and Littlewood in 1916. They demonstrated that math F y mathcal O left sqrt frac 1 y right math Curiously, they also show that this function is oscillatory as well, with diverging oscillations. In particular, there exists a value math K 0 math such that math F y frac K sqrt y math and math F y frac K sqrt y math infinitely often. This graph demonstrates that the second condition is not immediately apparent, numerically. The graph of this function appears to be remarkably linear in the region math 10 5 y 1 2 math and visually appears to have an intercept with the y axis at about 0.337877. However, on closer examination, one discovers oscillations of increasing magnitude as the function approaches math y 0 math . For the oscillations shown in this graph, a summation including more than 2 billion terms of the series was required. Copy to Wikimedia Commons Licensing Created by Linas Vepstas User Linas on 3 July 2006 GFDL migration relicense ... more details
Spike and wave is the term that describes a particular pattern of the electroencephalogram EEG typically observed during Epilepsy epileptic seizures . Spike and wave patterns are seen in many types of epilepsy , and in particular during absence seizures also called petit mal seizures , which are characterized by clear cut spike and wave EEG oscillations. The mechanisms underlying spike and wave patterns are complex and involve cerebral cortex and thalamus, the intrinsic properties of the neurons, and the various types of synaptic receptors present in the circuits. In particular, it is thought that a diffuse increase in cortical excitability either through enhanced excitation or diminished inhibition can lead to spike and wave patterns through thalamocortical loops. In this case, the spike and wave patterns can be synchronous over large portions of the entire cerebral cortex generalized spike and wave seizures . A focal increase of excitability can also entrain the thalamocortical system or part of it to generate spike and wave patterns, and various types of focal seizures . References http www.scholarpedia.org article Spike and wave oscillations Spike and wave Oscillations article in Scholarpedia Neuroscience stub Category Neuroscience fr Pointes Ondes ... more details
Summary Description br The rotating globe in the animation on the right represents the rotating Earth, and the black dot represents a balloon that is being swept along with air mass that has a velocity relative to the Earth s surface, and no atmospheric pressure gradient is present. The motion of the air mass is called inertial oscillations . In order to keep the number of animation frames manageble, the following adjustment has been made at 30 degrees latitude, the actual period of inertial oscillations is about 14 hours in the animation the depicted period is exactly one half of the Earth s rotation period. Other than that the depicted motion is accurate air mass moving dDue west is deviated to the north, due north is deviated to the east, due east is deviated to the south, due south is deviated to the west, and so on. Created br Uploaded on 20 may 2007 Author br User Cleonis Cleonis Licensing cc by sa 2.5 ... more details
Context date October 2009 one source date May 2010 Two sinusoidal oscillations of the same frequency are said to be mutually coherent if they exhibit a constant phase relationship during the course of time. See also Coherence physics Energy Phased array External links http www.ccr.jussieu.fr scbs b.htm Z.W.Wolkowski The Concept of Coherence Considered as a Systems Isomorphism physics stub Category Wave mechanics ... more details
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